How often does Corolla clean the throttle?

How much is the cleaning price of Corolla throttle? Corolla's throttle cleaning needs about 200 yuan, generally speaking: 1. Clean the throttle every 20,000 km to 40,000 km. If the environment in the car is not good, the cleaning interval should be shortened. 2. It is worth mentioning that maintenance is a good thing, but excessive maintenance will also bring irreversible damage to the car; 3. Excessive cleaning of the throttle will lead to premature scrapping of the throttle. Repeated cleaning will gradually wash away the special coating in the throttle chamber. If the inner cavity loses its coating, it is more likely to cause greasy adhesion, thus forming a vicious circle, and the final result is scrapping.